Re: [gentoo-user] duplicate HD drives

[Joseph]

On 09/12/14 23:52, Neil Bothwick wrote:
>On Fri, 12 Sep 2014 15:53:19 -0600, Joseph wrote:
>
>> I have two identical HD in a box and want to duplicate sda to sdb
>> I want sdb to be bootable just in case something happens to sda so I
>> can swap the drives and boot.
>>
>> Do I boot from USB and run:
>> dd if=/dev/sda of=/dev/sdb bs=512 count=1
>
>If you remove the cunt argument as already mentioned, this will copy the
>whole drive, but it will be incredibly slow unless you add bs=4k. It also
>only copies it once, as soon as you start using sda, sdb will be out of
>date. Set up a RAID-1 array with the two drives, then install GRUB to the
>boot sector of each drive, using grub2-install and you will always be
>able to boot in the event of a failure of either drive.
>
>
>--
>Neil Bothwick

I'll be interested in setting up RAID-1. Is it hard?
I've never done it and I know there is plenty of information on line about RAID-1

I'm not going to grub2 anytime soon.  This machine has BIOS and the HD has MBR partition.
With recent problem I had with my other older box (that has BIOS) and grub2 I'm not going to play with it.

Is it hard to set it UP RAID-1

-- 
Joseph